This is under the public_testing testing branch. In Steam right click on the game and select Properties. Then click on Betas tab on the left. There you will find a drop down list. Go down to the public_testing branch. The game will need to update. You can play SP and MP but only on MP with other people on the public testing branch so you may not see many games going. Obviously, expect bugs and issues since this is a beta testing branch, though my playthroughs have been mostly bug free I haven't done complex missions or other changes.

I'm not sure on SP, but in MP the host can click the "o" key on their keyboard and control the weather (on the flat screen display, not in VR) so you can have dynamic weather changes, or just play around.

We all thought it was just going to be an UFC (Up Front Controller) and frequencies. Baha brings us weather!!! This is absolutely amazing, and I have been having fun just punching through clouds and doing ILS approaches. Who needs to shoot any weapons, though this new game mechanic will open up missions with all new challenges and changes.

Anyway, I just wanted to show it off. Sometimes these updates come out and a person is gone for work for a few days, or just doesn't have a computer handy to try it out. You can take short look at what the changes look like visually.

Also, the AV42 also got a cockpit update.

There was a definite performance hit. Players with older computers may struggle with some of the weather conditions. That being said, overall I was able to play just fine even additional load of recording and the SCam.